package 树;

public class _112_路径总和 {
    public boolean hasPathSum(TreeNode root, int targetSum) {
        if (root == null) return false;
        if (root.left == null && root.right == null) return root.val == targetSum;
        return hasPathSum(root.left,targetSum - root.val)
                || hasPathSum(root.right,targetSum - root.val);
    }
}
